Extract a substring between two characters in a string PHP

Question

Is there a PHP function that can extract a phrase between 2 different characters in a string? Something like substr();

Example:

$String          


        

Answer 1

(moved from comment because formating is easier here)

might be a lazy approach, but in such cases i usually would first explode my string like this:

$string_array = explode("=",$String); 

and in a second step i would get rid of that "]" maybe through rtrim:

$id = rtrim($string_array[1], "]");

...but this will only work if the structure is always exactly the same...

-cheers-

ps: shouldn't it actually be $String = "[modid=256]"; ?